Wednesday and Thursday will feel more like summer than fall across San Diego County as a high pressure system drives temperatures into the upper 70s along the coast to the low-to-mid 80s in most foothill and valley communities. It'll be quite a change from Sunday and Monday, when low pressure had us reaching for coats and jackets. The National Weather Service says the high pressure will produce mild, dry offshore winds that'll be stronger in the mountains than at the coast. But the offshore flow could be just strong enough to smooth the face of the small waves that'll arrive from the west-northwest. Sea surface temperatures are in the 61-63 degree range. Surf will be 2' to 3' at most spots.